Improvement in scale-beams



.I. F. KEELER.

Scale Beam.

Patented July 12, 1864.

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UNITED STATES PATENT OFFICE.

JOEL F. KEELER, OF PITTSBURG, PENNSYLVANIA.

IMPROVEMENT lN SCALE-BEAMS.

Specification forming part of Letters Patent No. 13,5l 1, dated July 12,1864.

To all whom it may concern:

Be it known that I, J. F. KEELER, of Pittsburg, in the county ofAllegheny and State of Pennsylvania, have invented a new and ImprovedMode of Constructing the Levers of Platform or other IVeighing Scales;and I do hereby declare that the following is a full and exactdescription of the same, reference being had to the accompanyingdrawings, with the letters of reference marked thereon, in which- FigureI is a top view. Fig. II is a side view of the said lever, and Fig. IV acrosssection made at the red line a, Figs. I and II. Fig. III is a sideview of a new set of combined pivots, m, Figs. I, II, and III.

The nature of my invention consists in forming the levers used in aplatform-scale, or constructing the said levers of two or more fiat barsof iron held in a perpendicular position to each other by means of kneesand rivets, and in making or forming two pivots in one piece of metal,usually of steel.

To enable others skilled in the art to make and use my invention, I willproceed to describe its construction and operation.

I construct my levers with pivots or bearings made in any of the knownforms, and attached to the levers or arms of the scale by any of theknown methods; but the levers themselves, or such of them as I choose, Iconstruct of two bars of flat wrought-iron, the lower one lying flat orhorizontally, the other resting on its edge about the middle of thelower one and longitudinally with it, as shown in Figs. I, II, and IV ofthe drawings, in which Fig. I is a top view, Fig. II is a sideelevation, and Fig. IV is a crosssection made at the red line (1, Figs.I and II.

Like letters refer to like parts.

0 0 0, Figs. I, II, and 1V, represent the lower bar lying flat, and b 11represent the upper bar standing on its own edge or narrowest diameterabout the middle of the width of the lower one and longitudinally withit. at rep resents knees, so called,for holding the bars together in theposition toward each other, just described. 0 represents the rivetswhich fasten the knees firmly to the iron bars standin g as aforesaid. frepresents the forward or minor of the three pivots or bearingsnecessary for making and using a weighing-lever in platform or otherscales. I make this pivot also in any of the known forms, and attach orfasten it to the lever in any'known manner.

122 represents the two main pivots or bearings of a weighing-lever,either of which must sustain the entire weight that is to be weighed atany given draft. They are here combined and made in the same piece ofmetal for three reasons: first, that there may be less danger of theirbeing displaced in reference to each other; second, that they may beplaced closer to each other than they could otherwise be, thuspermitting the scales to be made more compactly than otherwise; third,that they may be driven out of the lever which holds them, as seen at m7:, Figs. I and II, which part of the lever may be called the mainpivot-holder, and is made and attached to the rest of the lever in anyknown manner, and after being driven out may be conveniently fitted up,and their steel edges tempered before being driven to the lever again.

The knees or corner-irons d d I usually make in narrow pieces, and putthem on alternately upon the two sides of the flat bar I); but whengreat strength is required I sometimes put them opposite each other, ormake them continuous out of a single piece of angle-iron. By this methodof constructing the weighing-levers of scales I am enabled to buildscales with less weight of iron and less cost than by other modes ofmaking wrongh tiron scales, and more compact.

What I claim as my invention, and desire to secure by Letters Patent forthe purposes mentioned, is

l. The wrought-iron weighing-lever, constructed as described.

2. The combined main pivots, when made as described.

3. The construction of the main pivotholder m h with the arrangement ofpivots therein, substantially as shown.

Iittsburg, Pa., January 11, 1863.

JOEL F. K EELER.

Witnesses Gno. F. GILLMORE, WM. 0. GILLMORE.

